cython

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cimport cython.operator
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from cython.operator cimport dereference
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from cython.operator cimport dereference as deref
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def test_deref(int x):
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    """
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    >>> test_deref(3)
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    (3, 3, 3)
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    >>> test_deref(5)
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    (5, 5, 5)
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    """
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    cdef int* x_ptr = &x
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    return cython.operator.dereference(x_ptr), dereference(x_ptr), deref(x_ptr)
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def increment_decrement(int x):
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    """
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    >>> increment_decrement(10)
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    11 11 12
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    11 11 10
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    10
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    """
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    print cython.operator.preincrement(x), cython.operator.postincrement(x), x
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    print cython.operator.predecrement(x), cython.operator.postdecrement(x), x
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    return x
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